It is not possible to absorb a piece of bone, this situation is common in avulsion fracture, this situation will appear after the avulsion location of obvious redness, swelling, pain, usually take a plaster for immobilization, after immobilization, if the broken end of the fracture can be bony connection, it will be able to return to normal. If there is an avulsion fracture continue to carry out activities, it will lead to the broken ends of the fracture do not heal, the formation of fibrous connection, so that the pain can also be significantly reduced, but the limb’s function of the activities often appear to decline. There is also a situation in the bone to bone collision, there are small pieces of bone off, this situation is easy to fall into the joint cavity, after a long time will be some inflammatory metabolic products surrounded, after a long time will form a free body, free body after the emergence of the joints lead to joint interlocking, that is, in the usual walking or climbing stairs when the joints suddenly stuck, and then the joints shake after the normal function of the joints can be restored. The normal function of the joint can only be restored after shaking the joint. Generally, this condition requires arthroscopy to remove the free body to restore normalcy.